Not very long but sometimes on those long nights when your really tired and not paying attention you will try to "force" the fan to turn without pushing the actuator button and as you know that just don't work!
I actually got my Werner Linear Actuator off E-bay but they are available at several sources. For the 60t idler sprocket I am running 6in travel is all you can really use, if you have a larger diameter sprocket you could use more travel. They come in even lengths typically. My actuator has a clutch in it so it will overload and slip on the clutch when you reach the limits of travel or if the fan is stuck on something(tree, limb, body) so it will not burn up the unit. Mine has about a 400# load limit and about 250# at working load and turns my fan just as easy at full throttle as it does at idle.
bump on this one. its sparked my interest. hopefully we can get some more pix and some more usefull info. this appears to be the best "user friendly" fan. for me and everybody else attemting a winter fan build, lets do it together.-thanks mud.
can anybody tell me if i use a push/pull airboat style stick on a chain drive like this to achieve 360* how much effort will it take to turn? i understand that theres alot of factors like lever length,sprocket size,ect. but what would be a average pound to swing the stick? would it be different under thrust?